Question

Carina records the height of a candle after x hours burning. Her data are shown in the graph below.

Burning Candle
A graph has time burned (hours) on the x-axis and candle height (centimeters) on the y-axis. A line goes through points (2, 6), and (1, 8).




Which is the best estimate for the height of the candle after 1 hour?
4 cm
5 cm
8 cm
9 cm

Answer 1

8 cm

The line goes through (1, 8), so at x = 1 hour the height is 8 cm (slope is −2 cm/hour: 10 cm at 0 hr, 8 cm at 1 hr, 6 cm at 2 hr).